sing file 1

real    0m13.140s
user    0m12.825s
sys     0m0.209s
compressing file 2

real    0m13.259s
user    0m12.952s
sys     0m0.196s
compressing file 3

real    0m10.876s
user    0m10.664s
sys     0m0.120s
compressing file 4

real    0m10.434s
user    0m10.206s
sys     0m0.140s
compressing file 5

real    0m9.940s
user    0m9.722s
sys     0m0.136s
compressing file 6

real    0m9.330s
user    0m9.110s
sys     0m0.140s
compressing file 7

real    0m8.695s
user    0m8.488s
sys     0m0.132s
compressing file 8

real    0m7.958s
user    0m7.758s
sys     0m0.132s
compressing file 9

real    0m7.132s
user    0m6.962s
sys     0m0.112s
compressing file 10

real    0m7.334s
user    0m7.146s
sys     0m0.124s
compressing file 11

real    0m7.376s
user    0m7.163s
sys     0m0.148s
compressing file 12

real    0m7.341s
user    0m7.161s
sys     0m0.116s
compressing file 13

real    0m5.838s
user    0m5.701s
sys     0m0.088s
compressing file 14

real    0m5.419s
user    0m5.289s
sys     0m0.084s
compressing file 15

real    0m5.091s
user    0m4.986s
sys     0m0.064s
compressing file 16

real    0m4.699s
user    0m4.569s
sys     0m0.088s
compressing file 17

real    0m4.485s
user    0m4.376s
sys     0m0.068s
compressing file 18

real    0m4.326s
user    0m4.217s
sys     0m0.068s
compressing file 19

real    0m3.146s
user    0m3.051s
sys     0m0.064s
compressing file 20

real    0m3.481s
user    0m3.395s
sys     0m0.052s
compressing file 21

real    0m2.375s
user    0m2.307s
sys     0m0.044s